Steps:
- Create C++ project with such code:
------------------------------------------------
struct MyStructWithLongName {
    int i;
    int j;
};

int main(int argc, char** argv) {
    MyStructWithLongName* a;
    a. // <-- press Ctrl-space
    return (0);
}

------------------------------------------------
- Call code completion listbox in "main" function after "a."
==> I see "MyStructW" only in code completion listbox title

I think at least the first 20 or 30 letters should be visible in title.